- Dynamic resource allocation: when a claim uses "wait for first consumer" allocation (the default), then it will now get deallocated after it was used by a pod. That ensures that the next pod isn't affected by previous scheduling decision and that resources are not kept allocated unless really needed. If keeping a claim...

- When `SchedulerQueueingHints` is enabled, clear events cached in the scheduling queue as soon as possible so that the scheduler consumes less memory. ([#120586](https://github.com/kubernetes/kubernetes/pull/120586), [@sanposhiho](https://github.com/sanposhiho)) [SIG Scheduling]

- Remove insecure serving configuration from cloud-provider package, which is consumed by cloud-controller-managers. ([#108953](https://github.com/kubernetes/kubernetes/pull/108953), [@nckturner](https://github.com/nckturner))

* Change ImageGCManage to consume ImageFS stats from StatsProvider ([#53094](https://github.com/kubernetes/kubernetes/pull/53094), [@yguo0905](https://github.com/yguo0905))

- `diskformat` storage class parameter for in-tree vSphere volume plugin is deprecated as of v1.21 release. Please consider updating storageclass and remove `diskformat` parameter. vSphere CSI Driver does not support diskformat storageclass parameter.
  
  vSphere releases less than 67u3 are deprecated as of v1.21. Please consider upgrading vSphere to 67u3 or above. vSphere CSI Driver requires minimum vSphere 67u3.
  

*   You can now disable AppArmor by setting the AppArmor profile to unconfined. ([#52395](https://github.com/kubernetes/kubernetes/pull/52395),[ @dixudx](https://github.com/dixudx))
*   ImageGCManage now consumes ImageFS stats from StatsProvider rather than cadvisor. ([#53094](https://github.com/kubernetes/kubernetes/pull/53094),[ @yguo0905](https://github.com/yguo0905))

"ephemeral-storage" so that this resource can be allocated, limited, and consumed as the same way as CPU/memory. All the features related to resource management (resource request/limit, quota, limitrange) are available for local ephemeral storage. This local ephemeral storage represents the storage for root file system, which will be consumed by containers' writable layer and logs. Some volumes such as emptyDir might also consume this storage. ([#60159](https://github.com/kubernetes/kubernetes/pull/60159),...

* Bump CNI consumers to v0.5.1 ([#43546](https://github.com/kubernetes/kubernetes/pull/43546), [@calebamiles](https://github.com/calebamiles))

Defaulting will be available as alpha in Kubernetes 1.15 and requires structural schemas.

#### CustomResourceDefinition OpenAPI Publishing

OpenAPI specs for native types have long been served at /openapi/v2, and they are consumed by a number of components, notably kubectl client-side validation, kubectl explain and OpenAPI based client generators.

- Extended the NodePorts scheduling plugin to consider hostPorts used by restartable init containers. ([#132040](https://github.com/kubernetes/kubernetes/pull/132040), [@avrittrohwer](https://github.com/avrittrohwer)) [SIG Scheduling and Testing]